I'm wondering which kind of technology the touch screen uses. It responds very badly when holding the stylus upright, not at all like my PRS-650. Often it does not detect a swipe to change page. If I tilt it so that the actual stylus comes closer to the screen it works.

It's almost like the small plastic tip is too long so that the distance to the screen is to large when holding the stylus upright or close to upright.